1 Samuel 17:12-13

17:12 Now David was the son of this Ephrathite named Jesse from Bethlehem in Judah. He had eight sons, and in Saul’s days he was old and well advanced in years. 17:13 Jesse’s three oldest sons had followed Saul to war. The names of the three sons who went to war were Eliab, his firstborn, Abinadab, the second oldest, and Shammah, the third oldest.